Where were you living... under a rock!
The Original GTX260 (192sp) released 6/16/2008 and then
not even 10 days later the 4870 came out... and wham! At $300 the 4870, to use others phrases "clean the GTX260 clock". In the Diamond 4870 review of June 30th W1zzard could even bring himself to show the GTX260 (shown at the time at $450) in the review!
http://www.techpowerup.com/reviews/Diamond/HD_4870/1.html
It got so bad so Nvidia and AIB partners where compelled to send out checks reimbursing those first buyers to the tune of between $60-125. I was such an embarrassment that Nvidia went all hands on deck to get the "Core 216" release in exactly 3 months achieving parity in price while still performance waned in like the newer titles like Quake4.
http://www.xbitlabs.com/news/graphi..._on_GeForce_GTX_200_after_Price_Collapse.html
And just months ago the GTX680 was "some great coup" over a 7970; 3-1/2 months behind and 10% less for only small performance here and there? That's nothing compared to 10 days and 25%. While nobody was needing to send any hush money…